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King Engine Bearings MB 546AM1.5 Main Bearing Set for Mitsubishi G25B 4G54 4G53

(Dodge Challenger 1978-83, Caravan 1984-87, D50 1979-82, Ram 50 1983-89, Colt 1974-80, 1984, 600 1983-85, Raider 1987-89, Power Ram 50 1983-86 + 22 more models)

Part of: King Engine Bearings Main Bearing Set Oversize

Other options in this family: King Engine Bearings MB5835SI0.5 King Engine Bearings MB5280SI0.5 King Engine Bearings MB5557SI0.75 King Engine Bearings MB5770SI0.25 King Engine Bearings MB5845SI

Manufacturer

Picture for manufacturer King Engine Bearings

Part Number

MB 546AM1.5
14 reviews
Sale Price

$32.39

Estimated ship date Saturday, November 21

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Product Details

The King Engine Bearings MB 546AM1.5 is a complete main bearing set engineered for Mitsubishi G25B, 4G54, and 4G53 engines. Manufactured to precise OEM tolerances, these bearings are designed to restore proper crankshaft clearances and ensure reliable, long-lasting engine performance.

Material Construction:

  • Bi-Metal Aluminum Construction – Engineered with a standard aluminum-based bearing material equivalent to SAE-783, optimized for low to medium load engine applications
  • The aluminum alloy overlay provides excellent conformability, embeddability, and corrosion resistance for dependable service life
  • Bi-metal design bonds a precision aluminum alloy lining to a strong steel backing for dimensional stability under operating loads

Key Features:

  • Oversized by 1.5mm to accommodate reground or worn crankshaft journals
  • Manufactured to strict dimensional tolerances for consistent oil film thickness and proper hydrodynamic lubrication
  • King's proprietary manufacturing process ensures uniform wall thickness throughout each bearing shell
  • Complete set covers all main journal positions

King Engine Bearings is a globally recognized OEM and aftermarket bearing supplier trusted by engine builders worldwide. The MB 546AM1.5 is an ideal choice for engine rebuilders restoring Mitsubishi G-series and 4G-series powerplants to factory specification performance.

Products specifications

Fits

Dodge Challenger 1978-83, Caravan 1984-87, D50 1979-82, Ram 50 1983-89, Colt 1974-80, 1984, 600 1983-85, Raider 1987-89, Power Ram 50 1983-86, Aries 1981-85, Conquest 1984-86, 400 1982-83, Mini Ram 1984-88 + 19 more models

Flange Oversize

FL O/S 0.25mm

Undersize

1.5

Material

bimetal (aluminum base)

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